Wringer



April 29, 1952 w. L. KAUFFMAN, n

WRINGER 5 Sheets-Sheet l Filed Aug. 8, 1946 April 29, 1952 w. KAUFFMAN,1I

WRINGER 5 Sheets-Sheet 2 Filed Aug. 8, 1946 Bnventor April 29, W KAUFFMAN, nl WRINGER Filed Aug. 8, 1946 '3 Sheets-Sheet 5 SW sm? Patented Apr. 29, 1952 UNITED STATES PATENT OFFICE'l WRINGER Walter L. Kauffman, II, Erie, Pa., assignor to Lovell Manufacturing Company, Erie, Pa., a corporation of Pennsylvania Application August 8, 1947, Serial No. 767,615

14 Claims. (Cl. 68-255) 1 This invention is a clothes wringer, features of which include a safety release and an index actuated by aithrust on the wringer. Other objects are features( increasing the sensitivity of the release andfpreventing unwanted operation of the release and index. Further objects and advantages appear in the specification and claims.

Inl the drawings, Fig. 1 is a side elevation of a wringer in section through the wringer head; Figs. 2 and 3 are fragmentary views of the reversing yroll drive gears and of the shifter arm; Fig. 4 is awsection of line 4--4 of Fig. 2; Fig. 5 is a fragmentary section through the roll end of the roll'drive coupling; Fig. 6 is a section of an alternative roll drive coupling; Fig. 7 is an end view of the lubricating arrangement for the roll drive gear; Fig. 8 is a bottom view of the wringerhead casting; Fig. 9 is an end view of the wringer head showing the driving gearing latched in the driving position; Fig. 10 is a view similarto's-Fig. 9 showing the position of the parts upon release of the driving gearing; Fig. l1 is a fragmentary view showing the position of the blocking plate for the index lock upon return of the wringer to a central position following release of the driving gear; Fig. 12 is a perspective view of the blocking plate for the index lock and Fig. 13 is a back view of the latch plate for the drive gearing.

Referring to the drawing. I indicates the wringerjhead, 2 the bottom frame. 3 top frame, 4 and EFLthe upper and lower rolls, and 6 the water boards mcarried by the bottom frame. One end of the top frame is hinged at 1 on a bracket 8 projecting.; from the bottom frame over the top of the wringer head and the other end of the top frame is connected to the bottomframe through a toggle release lever 9. The roll pressure spring (not shown) is arranged between the top and bottom frames. A roll pressure release bar I actuates Troll pressure release mechanism (not shown) releasing the pressure betweenthe rolls. The parts so far described are or may be of common construction.

The wringer is pivotally mounted on the head by a shoulder bolt II 'extending through the bracket 8 and by a shoulder bolt I2 extending through a bracket I3 at the lower end of the bottom frame 2. The pivot axis of the frame extends substantially through the roll end of a roll drive coupling I4 as shown in detail in Figs; and 6. The roll drive coupling comprises a tubular sleeve slotted at each end to receive tangs I5 respectively on a. roll drive shaft I6 and on a shaft I1 cast in the hub I8 of a crown gear I9.

As shown in Fig. 5, the slotted ends of the couplinghave rounded drive faces 20 which accommodate variations in angular alignment of the shafts I6 and Il. The pivot axis of the wringer frame extends substantially through the normal point of driving contact between the tang I5 on the roll drive shaft and the curved driving faces 20. This means that the driving torque exerts substantially no turning moment tending to pivot the frame about its mounting II, I2. The same result is achieved with the form of drive coupling shown in Fig. 6 which comprises a tubular sleeve 2| having a slotted end 22 receiving a drive pin 23 in the roll drive shaft I6.

- The hub I8 of the crown gear I9 is journalled in a porous metal bearing 24 pressed in a boss 25 on the wringer head casting. Around the vouter periphery of the bearing are grease receiving grooves 26. The back face of the crown gear wipes across eccentric grease feeding grooves 21, the inner ends of which are tangent to the upper and lower grooves 26. In either direction or rotation, grease will tend to be fed from the grooves 21 into the ends of the grooves 26. thus assuring replenishment of the lubricant for the bearing 24. ."The crown gear meshes continuously with upper and lower drive pinions 28 and 29 loose on a shaft 30 having a slotted lower end 3| for connection with a drive shaft (not shown) extend-ing up through the wringer post 32. y Splined on the upper end of the shaft 30 is a 'clutch collar 33having a groove 34 receiving a shifter bar 35. The. bar is shifted up and down on the shaft 30 byI a` pin 36 in an eccentric 3l. Inlthe driving position illustrated in Fig. 2, the pin 3B.is at one side of the shaft 30 so that the separating force caused by engagement of tapered teeth 38 on the clutch and drive pinion would normally tend to tilt the shifter bar about the pin 36 and thereby producevfexcessive pressures on the upper' and lower surfaces on the groove 34. This pivoting is resisted by projections 39 on the end cover plate 40 of the wringer head. This means that in the driving position the shifter bar 35 is held essentially horizontal or parallel with the side walls or end walls of the groove 34. The construction is such that ,close tolerances are not required because even if the projections 39 permit the shifter bar to assume a position slightly away from the horizontal the movement from the horizontal is limited so as to prevent excessive wear. In the neutral position shown in Fig. 3 the shifter bar is out of contact with the projections 39 but in this position there is no separating force on the clutch teeth tending to tilt the shifter bar.

K journalled in the cover plate 4i) of the wringer head and having its inner end fixed to the eccentric 31 and its outer end fixed to a latch plate 42. The latch plate has a pin and slot connection 43 with a cam plate 44 fixed to a hub v45 journalled on a reduced portion 46 of the shaft 4I. On the outer end of the hub 45 is fixed a control handle 41. Endwise movement of the hub 45 is prevented by a set screw 48 havingrits inner end received in a groove 49. The latch plate 42 is held in the driving position by a pin 50 carried by one arm of a bell crank latch lever k5I pivoted at 52 on the end plate 4D. In the driving positions the pin 5B engages either a surface 53 ora surface 54 on the latch plate 42. The angularity of the surfaces 53 and 54 being such that in the driving positions the force exerted on the pin 50 tends to move the pin inward along the surfaces 53 or 54. While from Fig. 13 it would appear that the angularity of the surfaces 53 and 54 is different, in the driving position the angularity with reference to the pin 5! is the same. The latch pin 50 is biased toward the surfaces 53 and 54 by a spring 55 arranged between an ear 55 on the lever 5I anda pin 51 on a bell crank lever58 pivoted at 59h on the cover plate 14l). Associated with the bell crank lever 53 is another bell crank lever 58a pivoted at 52 on the cover plate. The bell crank levers 58 and 58a ,have arms 59, 59a presented toward each other and connected by a tongue and slot connection 60 so that the bell crank levers 58 and 58a pivot together `and in opposite directions about their respective pivots 5913` and 52. The tension of `the spring 55 urges the bell crank levers 58 and 58a against theouter faces of walls 6I, Gla de'- pending from the bracket 8. The spring 55, therefore, tends to center the wringer frame with `respect to the wringerhead. When the parts are in vthe driving position illustrated in Fig. 9, .a push or pull on any part of the wringer overhanging the wringer head causes the wringer frame to pivot 'about the bolts I I, I2 and thereby 'move the bracket 8 to one side of a center position. If the Vmovement is only slight lsuch as mightbe eected by accidentally touching the o'u'ter end of the wringer, the spring 55, acting `throughthe bell cranks 58 and 58a, immediately returns the wringer to the center position. The restoring force of the spring 55 increases with increasing displacement of the wringer from the .center position. Upon a somewhat 'greater pivotal movement of the wringer frame the arms 59, 59a of the bell crank levers are moved Vupward against a tab 62 on the latch lever 5l 'and .start the movement of the latchlever to lretract the latch pin 50 out oi' engagement with the latch surface 53 (or 54). The slight lost motion between the arms 59, 59a and the tab 62 prevents the starting of the latch release movement until there is more than a slight turning of the wringer frame about its pivots II, I2. If the movement of the latch pin 50 is insufticient to move it clear of the latch surface 53` (or 54) the spring 55 vreturns the wringer to the center position assoon .as the displacing force `iS .removed- -The :force exerted on the latch pin 59 will normally move it toward the bottom of the surface 53 (or 54) but this is not necessary and in any event is independent of the centering of the wringer by the spring 55. When the turning of the wringer is suicient to move the latch pin 50 clear of the surface 53 (or 54) the control shaft 4I is released permitting the clutch to be returned to neutral in part by the torque reaction between the tapered driving teeth 38 and in part by a spring force transmitted from a spring 63 surrounding an index lock pin 54 through a plate 65 to surfaces 5B, 65a on the latch plate 42. The lower end of the plate 65 has an inwardly extending ange 61 guided on a reduced upper end 68 of the index lock pin 64. The upper end of the plate 65 extends in back of the latch plate 42 and has at each side an outwardly extending tab 69, 69a for cooperation with the surfaces 66, 65a on the latch plate. The construction described so far provides a sensitiverelease for the roll drive which may be actuated by the instinctive or reilex pull of the operator to escape from the rolls. Once the drive to the rolls has been interrupted the panic condition is removed. The interruption of the roll drive accordingly serves as a safety release.

The pivoting of the wringer framersubstantially on an axis passing through the roll drive end of the coupling I4 permits a more sensitive release without obtaining unwanted releases. If the axis of the pivots Il, I2 is shifted to the opposite end of thecoupling 4, the driving force exerted by the coupling on the roll drive shaft I6 causes the Wringer frame to oscillate at roll shaft speed about its pivots and under extreme loads the oscillation may cause tripping of the release. Even if the oscillation of the Wringer frame is insufficient in itself to trip the-release, the oscillation is objectionable. The oscillation introduces avariable in the force required to trip the release which prevents the use of a sensitive release Vif unwanted releases are to be avoided. There is also psychological objection to the oscillation or Wabbling of the Wringer frame during use.

The wringer Vdrive gearing may be set and released from the driving position by the control handle 41. In the neutral position of the gearing, the latch pin rests in a rounded depression 10 in the cam plate 44Y which centers the control handle in the neutral position. In this position, the latch plate 42 is centered by engagement of the surfaces S6, 66a with the tabs 69, 69a on the plate 55. Theinitial-movement of the handle 41 takes up the lostmotion'in the pin and slot vcon-- nection 43 and brings one of the rounded cam projections 'II under the latch .pin 50. This raises the latch pin to the level of surfaces 12 onthe latch plate. Upon further turning of the handle, the cam and latch plate move together until the latch pin 50 snaps behind the surface 53 or 54 holding the clutch in the engaged position. When the pin 50 engages the surface 53, the surface 65a on the latch plate engages the tab` 69a on the plate 65 forcing the plate downward againstthe spring 63. When the pin 5B engages the surface 54, the surface 66a is clear of the tab 69a andthe surface 56 engages the tap 69 to force the plate 65 downward. In either case, the latch plate is urged toward neutral by the spring 63. Only a short travel of the handle is necessary because of the large diameter of the eccentric 31. In the engaged position of the clutch, there is suiflcient lost motion `in the pin and slot connection 43s() Vthat upon movement of the handle 41 back to- Ward neutral, one of the rounded projections 1| on the cam plate lifts the latch pin clear of the latch surface 53 or 54 before the lost motion is taken up. Thereafter, the release of the roll drive takes place under the force of the spring 63 and the torque reaction between the tapered teeth 38. 1f the spring and torque action is insufficient to release the drive, the drive may be forcibly released by turning the handle back to neutral At the lower end of the wringer head is a depending tubular sleeve 'I3 telescoped over the upper end of the wringer post 32. In the inner surface of the sleeve are grease grooves 14 which help in preventing binding on the wringer post. The lower end of the sleeve 13 has an arm 15 in line with the wringer frame carrying a domeshaped hardened projection 16 which cooperates with chamfered holes 11 in an index collar '[8 on the wringer post to locate the wringer in the desired angular position. Diametrically opposite the arm 15 is an arm 19 slidably carrying in its outer end a U-shaped hold down plate 80, the lower arm 8l of which is hooked beneath the index collar 'I8 and the upper arm 8m of which engages a spring 82 around the index lock pin 64. The spring 82 reacts between a seat 83 and the arm 8 la and partially counter-balances the overhung weight of the wringer frame.

The wringer is yieldably indexed by the interiltting of the projection 'I6 in the chamfered index holes 11, the resistance being determined by the angle of chamfer. Rounding the projection 16 does not change the initial resistance but makes subsequent turning smoother than as if the projection 16 had a conical surface matching the chamfer, Turning of the wringer head relative to the index collar 13 results in lifting of the wringer. It is-therefore desirable that the wringer slide freely and not bind on the wringer post so the projection 16 will drop in the desired index hole. The grease grooves 14 and the counterbalance spring 82 prevent binding on the wringer post.

An interlock between the index and the roll drive is desirable so the wringer will always be locked in index position when the rolls are being driven. This interlock is provided by the index lock pin 64 which registers with one of the holes 11 in each index position. The index lock pin is guided in a projection 84 on the cover plate 40 and in hole 85 and in hole 86 in the arm 19. In the driving position, the plate 65 engages shoulder 81 on the index lock pin and forces it down well through the registering opening 11. y There is a substantial clearancebetween the opening 11 and the index lock pin so the index lock pin merely serves as a safety stop or lock holding the wringer indexed under stall loads as explained in greater detail in my application Serial No. 671,593. This results in a wringer which is yieldably held in any selected index position in the absence of other forces, the yieldable restraint being insufficient to prevent movement of the wringer to another position by a push on the wringer if the index lock pin is disengaged. The clearance between the index lock pin and the registering holes 'Il prevents binding. The hold down plate 80 has a limited travel permitted by a slot 88 through whichan attaching screw 89 extends so it is impossible to put the wringer in driving condition unless the index lock pin registers with one of the holes 11. The hold down plate 80 will not permit the necessary lifting of the wringer head. The hold down plate is guided between walls 90 on the arm 19. Al plate 9| between the head4 of, the screw 89 and the plate 80 prevents loosening of the screw. i

When the safety release is operated. for example, by pulling the wringer, there is asubstantial tendency for this pull to also move the wringer out of its index position due to the retraction of the index lock pin by a spring 92. Thus an operator merely intending to stop the wringer drive by pulling on the clothes finds the wringer moved out of position. This nuisance tends to discourage the use of the safety release for stopping and thereby renders the use of the safety release less likely under panic conditions.

This is prevented by a blocking plate 93 slidably carried on the cover plate 40 in back of the ,bell cranks 58, 58d, the latch plate 42 and the plate 65. When the wringer is standing in neutral position, the upper end of the index lock pin 64 engages a tab 94- and forces the upper end 95 of the blocking plate 93 between the Walls 6|, (ila` of the frame bracket 8. YThis blocks the pvoted articulation between the wringer and head and makes the indexing smoother in that the only additional movement is the slight up and down movement of the wringer head as the wringer is turned from one index position to another.v In the driving position, the blocking plate 93 fallsvby gravity. If it should stick, the spring 92 engages a tab 96 and vforces the blocking plate down. This moves the upper end of the blocking plate clear of the bracket so the safety release is-con-f ditioned foroperation. Upon loperation of the safety release, by pushing or pulling the wringer, the bracket 8 movesover the top of the blocking plate (Fig. 10) holding the index locking pin down and thereby preventing movement of the wringer from the index position. Upon letting go of the wringer, the spring 55 returns the wringer frame to the central position permitting the lifti'n'gof the index pin and blocking plate.

In use, the wringer drive is set for the desired direction of rotation by the control handle 4.1. This is only possible when the wringer is in one of the index positions. Setting the drive latches the clutch 33 in driving position, depresses the index lock pin 64, and lowers the blocking plate 93 freeing the articulation between thefw'ringer frame and head. The wringer may be stopped by the controlhandle but it will be found more convenient to exert a` slight tug on the clothes going through the rolls. This pivotsthe wringer frame relative to the head and lifts the latch pin 59 to releasethe roll drive clutch. The clutch is returned to neutral lby the force of the spring 63 and the torque reactionbetween the tapered teeth 38. The'torque compensation prevents or procedure is to first stop the wringer by a pushv or pull on the wringer frame then allow the wringer to retu'rn to its central position'so the blocking plate is lifted and then move "the wringer to the new index position.

There is substantial independence in the design of the various functions of the wringer. The sensitivity of the safety release is determined almost solely by the strength of the centering spring 55. This spring exerts a restoring force proportioned to the displacement of the wringer fronr-its..:.ce nterf position;Y The magnitude. of ,theY spring force can be kept justfabovefthe nuisance'.

1evel, the` level at which accidental touchingaof the wringer causes unwanted operation of the.

safety.,release- The force required to index: the wringerfis determined by. the 4.angle of chamfer on rthe index-holes 11, the .weight of the wringer, andi the force of 'theA counterbalance Yspring .182. This'fforcecan bekept to av negligible value` since the index is neveroperated until after operation ofthe safety release. The blocking of theindex ldckluntil 'after the wringer has been centered makes it'--unnecessary to have azdifferential. between the index'force and the safety release force soias-toprevent unwanted operation of the index uponoperation of thesafetyrelease. The force requiredto'set the-gears in driving positionV is determined 'by the spr-ing- 63 vwhich has ia stiffness sorelated` to the Vangle ofY the driving' teeth .38 thatthegearing isy alwaysreturned to neutral, evenunder stallconditions. What I claim as new is:

1. In a swinging wringer having a head; a. frame articulatedto the head, a detent yieldably indexingthe head in any one of a plurality of angularpositions,Y afroll reversing drive of the type latched in the driving position and biased to neutral, and a release for the roll drivelatch, actuatedby articulation of the frame from a centerposition, the combination ofan index lock positively restraining lmovement of the head from anindex-position and` having a lost motion connectionwith the drive such that `the index lockcan remain-inthe locked position while the drive moves from the driving position, means setting thefindex-lockyin the locking position with the setting of the `drive in the driving position and releasing .the .index lock in the neutral position of the drive, means biasing-the index lock from the locking position, and means blocking unlocking of 'the` index lock upon articulation of the framefrom its. center position but not in its center position.

2;" In a wringer, a headhaving drivemechanism including a'roll drive shaft, means yieldablyindexing the head in any oneof a plurality of 'angular positions, and an index lock restraininggyielding movement of the head from an indexlposition beyond a predetermined range, aA roll"carrying frame,v an angularly tiltable couf upon" movement ofthe frame relative to the head,`

and asafety-release releasing saidv drive mechanism` and actuated by movement of the frame relative to the head.

35; In a'swinging wringer having a head, havk inga rolldrive shaft, a roll carrying' frame articaA ulatedto the head,V a coupling having oneend.

engagingthe shaft andthe other end for ensagement with said roll, a detent yieldably indexing Vthe head fin any. one of a plurality of angular positions, a roll drive of the type latched. inithe. driving position, a release for the roll drivelatch, actuated by articulation of the frame from ascenter position, an index llock positively Vrestraining movement of the head from an index position,.meanssetting the index lock in the locking., position with the setting ofthe drive in thegsdriving.;position,means biasing the index'. losigsfronc thaflocking-fposition: and :meansdoloclc.--t1

ing unlockingiotthe'indexglock uponarticulationv of theframefrom .theJcenterposition.V

4: In;a swinging wringer: having a. head; a;

frame. articulatedto the head, indexmeans hold'- ing .theheadinr any one of a..plurality4 of languelar. positions, a safety releasebA latch.4 memberl biased to. thelatch position, bellV cranks.each

having'one arm. engaging yieldably and centering, the yframe andithe .other arms interconnected to.4

move together, a connection .between one.- of said rst mentioned arms Aand the latch memberrefzfective -to move the latch member towardthe release position., an index lockV restrainingmova ment of` the .head 'from..anindexipositiorr and..

biased to unlocked position;uponzactuation.ofv

the safety release anda block effective .to prevent unlockingaof the .indexglockl `upon '-articula tion -of the framefrom the-centerpositions 5i In aswinging Wringerhavingahead with roll drive'gearing, a roll carrying frame artcu`A lated tothe head for movement relativel to the head under a thrust inthe direction to swing the.

wringer,A cam faced detents yieldablyf indexing the head in any one of a plurality of angular positions, said detents exerting a restrainingforce sufficient to'hold the -head indexed but in sufficient to prevent movement to another position by a pushon the wringer, meansresiliently centering the frame on the head, a. safetyv release including means for releasing the drive` gearing actuated by articulation of the frame, an

index lock for positively-restraining the head in the selected indexposition, means biasing the- Alock to the unlocked position, spring means re-V leasing the index` lock upon actuation of the re lease, and a block preventing unlocking 'of the index lock upon articulation ofA the frame from: its centered position;

6. In a swinging wringer having a-head including drive mechanism, a wringer post having an index collar on which the head sw-ings;

an index pin in the head, meanslbiasing the pinupward away from the collar, an interlockl mem-Y ber-for forcing the-pin downward, said member I beingslidable upward on the pin, means biasing' the member upward,`a'connection'A between the member'and the drive mechanism'fmovingthe drive mechanism oifby upward movement of the member, a latch holding the drive 'v on, and a safety release for releasing the latch;

"i, In a swinging j wringer having a head -in cluding drive' mechanism, a wringer post having-` an index 'collar on which the head swingspsaid'V collar having index-iholes'af cam faced projec-44 tion on the'head engageable'V with the vholesand yieldablycentering 4the wringer in an'indexpositio'n, an index pin' inthe head of substantiallyAv less diameter than the index holes, means-biase ing the pin upward away-from the index hole',` an interlock'member for forcing the pin down'- ward, 'said member being slidable upward on the pin, means biasing the member Aupwarda connecti'on between the member and the drivemechlanism movingV thedrive' mechanism off by upward movement of the member. a'la'tch holdv`A forces-:but insufficient to y:prevent movement to another; indexpostioniby ,-aipushlonthawringerf .operative connection actuated by bodily moveunlocking` .of the index lock upon bodily movement of the wringer frame relative to the :head from its' centered-position on the head vbut` not in its centered position.

9. In a swinging wringer having a wringer frame and head, means yieldably indexing the wringer head on a support in any selected one of a plurality of index positions, said means exerting a force restraining swinging of the wringer head from the selected index position suiilcient to hold the wringer in the indexed position but insuiilcient to prevent movement to another index position by a push on the wringer, means mounting the wringer frame for bodily movement relative to the head and centering the frame on the head, a safety release including an operative connection actuated by bodily movement of the wringer frame relative to the head from its centered position, a positive index lock for positively restraining movement of the wringer head from the index position, drive gearing in the head, a control for setting the gearing in driving and neutral positions, means biasing the positive lock to the unlocked position, an interlock between the control and the positive lock setting the positive lock in the locking position with the setting of the gearing in the driving position and unlocking the positive lock with the setting of the gearing in the neutral position, a lost motion connection between the control and the positive lock permitting the positive lock to remain in the locking position until the gearing is moved from the driving position, and means blocking unlocking of the index lock upon bodily movement of the wringer frame relative to the head from its centered position on the head.

10. In a swinging wringer having a wringer frame and head, means yieldably indexing the wringer head on a support in any selected one oi a plurality of index positions, said means exerting a force restraining swinging of the wringer head from the selected index position suii'icient to hold the wringer in the indexed position but insuflicient to prevent movement to another index position by a push on the wringer, means mounting the wringer frame for bodily movement relative to the head and centering the frame on the head, a positive index lock supplementing the yielding index and positively preventing movement of the head from the index position, drive gearingA in the head, interlock means between the drive gearing and the positive lock of the type compelling setting of the lock in the locking position upon setting of the drive gearing in the driving position but not compelling unlocking movement of the positive lock upon setting of the drive gearing in the oi position, means bias- 10 ing the positivelock to the unlocked position, a safety release including an operative connection between the frame and said drive gearing for returning the drive gearing to the off position and actuated by bodily movement of thel wringer frame relative to the head, and means blocking unlocking of the index lock upon bodily move- .ment of thewringer frame relative to the head from its centered position on the head.-

11. Ina swinging-'wringer having a head and frame, means yieldably centering A,the Kwringer head in any selectedone of a .plurali-ty--ofangular index positions, said means yieldablyy exerting a force restraining swinging of thewringer head from the selected index position less'thanythat required to hold the wringer indexed under stall loads, a safetyfrelease actuated by a thrust on the wringer frame in the direction to swing the same, an index 'lock"`.fo'r positively restraining swinging of the wringer head from an index jposition, said vindex lock havinglost motiontaken up by swinging of the wringer head from the centered position, means biasing the index lock to the unlocked position, means blocking unlocking of the index lock upon setting of the release, and means responsive to a thrust on the wringer frame in the direction'to swing the same for blocking unlocking of the index lock.

12. In a swinging wringer having a head, a roll carrying frame articulated to the head, means yieldably indexing the head in any one of a plurality of angular positions, said means yieldably exerting a force restraining swinging of the head from an index position less than that required to hold the head indexed under stall loads, a safety release actuated by articulation of the frame, an index lock for positively restraining swinging of the head from an index position, said index lock having lost motion taken up by swinging oi the head from an index position, means biasing the index lock to the unlocked position, and a block eiective to prevent unlocking of the index lock upon articulation of the frame.

13. In a swinging wringer having a head and a frame, means yieldably indexing the wringer head in any one of a plurality of angular positions, said means exerting a force restraining swinging of the wringer head from an index position less than that required to hold the wringer indexed under stall loads, means mounting the wringer frame for bodily movement under the instinctive reaction of the operator, a safety release actuated by said bodily movement of the wringer frame, an index lock for positively restraining swinging of the wringer head from an index position, said index lock having lost motion taken up by swinging of the wringer head from the index position, and means biasing the index lock to the unlocked position.

14. In a swinging wringer, a drive head having clutch members, index means centering and yieldably holding the wringer head in any selected one of a plurality of angular positions with a force insuiiicient to prevent deliberate repositioning by pushing the wringer against the holding force of the yieldable index means, a positive index lock having in the locking position surfaces disengaged throughout and oiering no restraint in the centered position of the wringer and interengageable upon, and postively limiting, movement of the wringer from the selected index position, spring means biasing the lock to the unlocked position, a control for the drive clutch members, an operative connection between the control and the lock moving the lock to the lockarid urblockin'gf movement' of the;- lockv to.y the umooked'lpostionas the cltchmembers are ldisengaged, a. -roll-containng'wringer framearticulated-'to the head, means'yieldably-centerng the fame on`the head whereby the freune' may be a'tculated from the 'centered' :position` b'yfa lforce saches the-instinctive :ceactio'r's of the operatorto escape from f the" wringeri rolsgl. e.. -sajfetyv release actuated b'y articulation of thewringerlframe from the centered position, `and .blocking m'ea'nsi forspreventing movementV of the vnclexi V1o ck from the. lockigf position; `s'a'id blocking rn'earsy being ineffective.A inl theYAY centered position.` of the wi''nger' fame and effective-upon articulation of theifwringer frame' from'. the' centered position.

WALTER,` La KAUFEMAN, .Il

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